Hybrid Construction Ceramic Ball Bearings

Product Description

Top Bearings is a professional leader China Hybrid Construction Ceramic Ball Bearings manufacturers with high quality and reasonable price. Welcome to contact us.

Product Parameter

Material:	Ceramic Ball For Rollers, Metal For Inner & Outer Ring	Material Of Balls:	ZrO2, Si3N4 Or Sic Material
Material Of Rings:	GCr15, AISI440C, 316, 304 Metal Material	Density:	ZrO2 Is 6g/cm3, Si3N4 Is 3.2g/cm3
Cycle Stress:	50*10^6	Application Temperature:	1000℃
High Light:	full ceramic bearings , ceramic ball bearings

Hybrid Construction Ceramic Ball Bearings , GCr15, AISI440C, 316, 304 For Inner & Outer Ring

Hybrid construction ceramic ball bearings

Ceramic ball especially Si3N4 have the following performance as low density, high strength, low friction coefficient, electrical and magnetism resistance, wear resistance, well rigidity, lubrication and maintenance free when working, the best choice for rollers (inner ring and outer ring are made by metal) of the hybrid construction ceramic ball bearing which are used in high-speed, high accuracy and long life environments. Normally, GCr15, AISI440C, 316, 304 makes inner ring and outer ring. The ceramic ball can adopt ZrO2, Si3N4 or Sic material.

Comparison of bearing material technical data

Technical data	unit	GCr15	9Cr18	Si3N4	AL203	ZrO2
Density	g/cm³	7.8	7.9	3.2	3.95	6
a Coefficient of expansion	10^-6/℃	11	17	3.2	9.1	10.5
E modulus of elasticity	Gpa	208	200	320	380	210
μ Poisson ratio		0.3	0.3	0.26	0.27	0.3
HV Hardness		800	700	1700	1800	1300
δ Flexural strength	Mpa	2400	2600	900	220	1000
δ Compressive Strength	MPa			2000	1500	3500
Kc Impact strength	Nm/cm²	20	25	7	3.5	11
λ Thermal conductivity	W/mk	30-40	15	3.5	25	2.5
Ω Specific resistivity	mm²/m	1	0.75	10^18	10^8	10^5
Specific heat	J/KgK	450	450	800	880	400
Application temperature	℃	120	150	1000	1850	800
Anti-corrossion		No	poor	Good	Good	Good
Cycle stress		10*10^6	10*10^6	50*10^6	30*10^6	50*10^6
Destroy model		peel	peel	peel	fracture	peel/fracture
Anti-magnetism		Yes	Yes	No	No	No
Dimension stability		bad	poor	Good	Good	Good
Insulate properties		No insulation	No insulation	Good	Good	Good

Basic properties of staple engineer plastic

Material	HDPE	PP	POM	PA66	PVDF	PPS	PTFE	PEEK
Long-time working temp.	90	100	110	100	150	230	260	280
Density	g/cm3	0.91	1.42	1.14	1.77	1.35	2.18	1.32
Ball indentation hardness	50	80	170	170	80	190	30
Tensile stress	25	30	70	80	50	75	25	95
Sliding friction coefficient	0.29	0.3	0.34	0.35-0.42	0.3		0.08-0.1	0.3-0.38
Melted temperature	130	165	175	260	172	280	327	343
Short-time highest application temperature	90	140	150	170	150	260	260	300
Coet of Inear expansion (10^-5/K)	13-15	17	10	8	13	5	12	5
Dielectric constant at 1 Mhz(10^6HZ)	2.4	2.25	3.7	3.6-5	8		2.1	3.2-3.3
Volume resisrivity (Ω·cm)	>10^15	>10^24	>10^14	10^13	10^12	>10^13	10^14	10^13
flammability UL94	+	+	-	(+)	(+)	-	+	+
Anti-weathering	-	-	-	-	-	-	+	-
Note: + =resistant; (+) =partly resistant; - =non-resistant

Hybrid Construction Ceramic Ball Bearings , GCr15, AISI440C, 316, 304 For Inner & Outer Ring 0

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